﻿// /***************************************************************************
//  * SubbandLayer2.cs
//  * Copyright (c) 2015 the authors.
//  * 
//  * All rights reserved. This program and the accompanying materials
//  * are made available under the terms of the GNU Lesser General Public License
//  * (LGPL) version 3 which accompanies this distribution, and is available at
//  * https://www.gnu.org/licenses/lgpl-3.0.en.html
//  *
//  * This library is distributed in the hope that it will be useful,
//  * but WITHOUT ANY WARRANTY; without even the implied warranty of
//  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
//  * Lesser General Public License for more details.
//  *
//  ***************************************************************************/

namespace MP3Sharp.Decoding.Decoders.LayerII
{
    /// <summary>
    ///     Class for layer II subbands in single channel mode.
    /// </summary>
    internal class SubbandLayer2 : ASubband
    {
        // this table contains 3 requantized samples for each legal codeword
        // when grouped in 5 bits, i.e. 3 quantization steps per sample
        public static readonly float[] grouping_5bits =
            {
                -2.0f/3.0f, -2.0f/3.0f, -2.0f/3.0f, 0.0f, -2.0f/3.0f, -2.0f/3.0f, 2.0f/3.0f, -2.0f/3.0f, -2.0f/3.0f,
                -2.0f/3.0f, 0.0f, -2.0f/3.0f, 0.0f, 0.0f, -2.0f/3.0f, 2.0f/3.0f, 0.0f, -2.0f/3.0f, -2.0f/3.0f, 2.0f/3.0f,
                -2.0f/3.0f, 0.0f, 2.0f/3.0f, -2.0f/3.0f, 2.0f/3.0f, 2.0f/3.0f, -2.0f/3.0f, -2.0f/3.0f, -2.0f/3.0f, 0.0f,
                0.0f, -2.0f/3.0f, 0.0f, 2.0f/3.0f, -2.0f/3.0f, 0.0f, -2.0f/3.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 2.0f/3.0f,
                0.0f, 0.0f, -2.0f/3.0f, 2.0f/3.0f, 0.0f, 0.0f, 2.0f/3.0f, 0.0f, 2.0f/3.0f, 2.0f/3.0f, 0.0f, -2.0f/3.0f,
                -2.0f/3.0f, 2.0f/3.0f, 0.0f, -2.0f/3.0f, 2.0f/3.0f, 2.0f/3.0f, -2.0f/3.0f, 2.0f/3.0f, -2.0f/3.0f, 0.0f,
                2.0f/3.0f, 0.0f, 0.0f, 2.0f/3.0f, 2.0f/3.0f, 0.0f, 2.0f/3.0f, -2.0f/3.0f, 2.0f/3.0f, 2.0f/3.0f, 0.0f,
                2.0f/3.0f, 2.0f/3.0f, 2.0f/3.0f, 2.0f/3.0f, 2.0f/3.0f
            };

        // this table contains 3 requantized samples for each legal codeword
        // when grouped in 7 bits, i.e. 5 quantizationsteps per sample
        public static readonly float[] grouping_7bits =
            {
                -0.8f, -0.8f, -0.8f, -0.4f, -0.8f, -0.8f, 0.0f, -0.8f, -0.8f, 0.4f, -0.8f, -0.8f, 0.8f, -0.8f, -0.8f,
                -0.8f, -0.4f, -0.8f, -0.4f, -0.4f, -0.8f, 0.0f, -0.4f, -0.8f, 0.4f, -0.4f, -0.8f, 0.8f, -0.4f, -0.8f,
                -0.8f, 0.0f, -0.8f, -0.4f, 0.0f, -0.8f, 0.0f, 0.0f, -0.8f, 0.4f, 0.0f, -0.8f, 0.8f, 0.0f, -0.8f, -0.8f,
                0.4f, -0.8f, -0.4f, 0.4f, -0.8f, 0.0f, 0.4f, -0.8f, 0.4f, 0.4f, -0.8f, 0.8f, 0.4f, -0.8f, -0.8f, 0.8f,
                -0.8f, -0.4f, 0.8f, -0.8f, 0.0f, 0.8f, -0.8f, 0.4f, 0.8f, -0.8f, 0.8f, 0.8f, -0.8f, -0.8f, -0.8f, -0.4f,
                -0.4f, -0.8f, -0.4f, 0.0f, -0.8f, -0.4f, 0.4f, -0.8f, -0.4f, 0.8f, -0.8f, -0.4f, -0.8f, -0.4f, -0.4f,
                -0.4f, -0.4f, -0.4f, 0.0f, -0.4f, -0.4f, 0.4f, -0.4f, -0.4f, 0.8f, -0.4f, -0.4f, -0.8f, 0.0f, -0.4f,
                -0.4f, 0.0f, -0.4f, 0.0f, 0.0f, -0.4f, 0.4f, 0.0f, -0.4f, 0.8f, 0.0f, -0.4f, -0.8f, 0.4f, -0.4f, -0.4f,
                0.4f, -0.4f, 0.0f, 0.4f, -0.4f, 0.4f, 0.4f, -0.4f, 0.8f, 0.4f, -0.4f, -0.8f, 0.8f, -0.4f, -0.4f, 0.8f,
                -0.4f, 0.0f, 0.8f, -0.4f, 0.4f, 0.8f, -0.4f, 0.8f, 0.8f, -0.4f, -0.8f, -0.8f, 0.0f, -0.4f, -0.8f, 0.0f,
                0.0f, -0.8f, 0.0f, 0.4f, -0.8f, 0.0f, 0.8f, -0.8f, 0.0f, -0.8f, -0.4f, 0.0f, -0.4f, -0.4f, 0.0f, 0.0f,
                -0.4f, 0.0f, 0.4f, -0.4f, 0.0f, 0.8f, -0.4f, 0.0f, -0.8f, 0.0f, 0.0f, -0.4f, 0.0f, 0.0f, 0.0f, 0.0f,
                0.0f, 0.4f, 0.0f, 0.0f, 0.8f, 0.0f, 0.0f, -0.8f, 0.4f, 0.0f, -0.4f, 0.4f, 0.0f, 0.0f, 0.4f, 0.0f, 0.4f,
                0.4f, 0.0f, 0.8f, 0.4f, 0.0f, -0.8f, 0.8f, 0.0f, -0.4f, 0.8f, 0.0f, 0.0f, 0.8f, 0.0f, 0.4f, 0.8f, 0.0f,
                0.8f, 0.8f, 0.0f, -0.8f, -0.8f, 0.4f, -0.4f, -0.8f, 0.4f, 0.0f, -0.8f, 0.4f, 0.4f, -0.8f, 0.4f, 0.8f,
                -0.8f, 0.4f, -0.8f, -0.4f, 0.4f, -0.4f, -0.4f, 0.4f, 0.0f, -0.4f, 0.4f, 0.4f, -0.4f, 0.4f, 0.8f, -0.4f,
                0.4f, -0.8f, 0.0f, 0.4f, -0.4f, 0.0f, 0.4f, 0.0f, 0.0f, 0.4f, 0.4f, 0.0f, 0.4f, 0.8f, 0.0f, 0.4f, -0.8f,
                0.4f, 0.4f, -0.4f, 0.4f, 0.4f, 0.0f, 0.4f, 0.4f, 0.4f, 0.4f, 0.4f, 0.8f, 0.4f, 0.4f,
                -0.8f, 0.8f, 0.4f, -0.4f, 0.8f, 0.4f, 0.0f, 0.8f, 0.4f, 0.4f, 0.8f, 0.4f, 0.8f, 0.8f, 0.4f, -0.8f, -0.8f,
                0.8f, -0.4f, -0.8f, 0.8f, 0.0f, -0.8f, 0.8f, 0.4f, -0.8f, 0.8f, 0.8f, -0.8f, 0.8f, -0.8f, -0.4f, 0.8f,
                -0.4f, -0.4f, 0.8f, 0.0f, -0.4f, 0.8f, 0.4f, -0.4f, 0.8f, 0.8f, -0.4f, 0.8f, -0.8f, 0.0f, 0.8f, -0.4f,
                0.0f, 0.8f, 0.0f, 0.0f, 0.8f, 0.4f, 0.0f, 0.8f, 0.8f, 0.0f, 0.8f, -0.8f, 0.4f, 0.8f, -0.4f, 0.4f, 0.8f,
                0.0f, 0.4f, 0.8f, 0.4f, 0.4f, 0.8f, 0.8f, 0.4f, 0.8f, -0.8f, 0.8f, 0.8f, -0.4f, 0.8f, 0.8f, 0.0f, 0.8f,
                0.8f, 0.4f, 0.8f, 0.8f, 0.8f, 0.8f, 0.8f
            };

        // this table contains 3 requantized samples for each legal codeword
        // when grouped in 10 bits, i.e. 9 quantizationsteps per sample
        public static readonly float[] grouping_10bits =
            {
                -8.0f/9.0f, -8.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f,
                -8.0f/9.0f, -2.0f/9.0f, -8.0f/9.0f, -8.0f/9.0f, 0.0f, -8.0f/9.0f, -8.0f/9.0f, 2.0f/9.0f, -8.0f/9.0f,
                -8.0f/9.0f, 4.0f/9.0f, -8.0f/9.0f, -8.0f/9.0f, 6.0f/9.0f, -8.0f/9.0f, -8.0f/9.0f, 8.0f/9.0f, -8.0f/9.0f,
                -8.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f,
                -6.0f/9.0f, -8.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f, 0.0f, -6.0f/9.0f, -8.0f/9.0f, 2.0f/9.0f,
                -6.0f/9.0f, -8.0f/9.0f, 4.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f, 6.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f, 8.0f/9.0f,
                -6.0f/9.0f, -8.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f,
                -4.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f, -2.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f, 0.0f, -4.0f/9.0f, -8.0f/9.0f,
                2.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f, 4.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f, 6.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f,
                8.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f, -8.0f/9.0f, -2.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f, -2.0f/9.0f,
                -8.0f/9.0f, -4.0f/9.0f, -2.0f/9.0f, -8.0f/9.0f, -2.0f/9.0f, -2.0f/9.0f, -8.0f/9.0f, 0.0f, -2.0f/9.0f,
                -8.0f/9.0f, 2.0f/9.0f, -2.0f/9.0f, -8.0f/9.0f, 4.0f/9.0f, -2.0f/9.0f, -8.0f/9.0f, 6.0f/9.0f, -2.0f/9.0f,
                -8.0f/9.0f, 8.0f/9.0f, -2.0f/9.0f, -8.0f/9.0f, -8.0f/9.0f, 0.0f, -8.0f/9.0f, -6.0f/9.0f, 0.0f,
                -8.0f/9.0f, -4.0f/9.0f, 0.0f, -8.0f/9.0f, -2.0f/9.0f, 0.0f, -8.0f/9.0f, 0.0f, 0.0f, -8.0f/9.0f,
                2.0f/9.0f, 0.0f, -8.0f/9.0f, 4.0f/9.0f, 0.0f, -8.0f/9.0f, 6.0f/9.0f, 0.0f, -8.0f/9.0f, 8.0f/9.0f, 0.0f,
                -8.0f/9.0f, -8.0f/9.0f, 2.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f, 2.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f, 2.0f/9.0f,
                -8.0f/9.0f, -2.0f/9.0f, 2.0f/9.0f, -8.0f/9.0f, 0.0f, 2.0f/9.0f, -8.0f/9.0f, 2.0f/9.0f, 2.0f/9.0f,
                -8.0f/9.0f, 4.0f/9.0f, 2.0f/9.0f, -8.0f/9.0f, 6.0f/9.0f, 2.0f/9.0f, -8.0f/9.0f, 8.0f/9.0f, 2.0f/9.0f,
                -8.0f/9.0f, -8.0f/9.0f, 4.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f, 4.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f, 4.0f/9.0f,
                -8.0f/9.0f, -2.0f/9.0f, 4.0f/9.0f, -8.0f/9.0f, 0.0f, 4.0f/9.0f, -8.0f/9.0f, 2.0f/9.0f, 4.0f/9.0f,
                -8.0f/9.0f, 4.0f/9.0f, 4.0f/9.0f, -8.0f/9.0f, 6.0f/9.0f, 4.0f/9.0f, -8.0f/9.0f, 8.0f/9.0f, 4.0f/9.0f,
                -8.0f/9.0f, -8.0f/9.0f, 6.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f, 6.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f, 6.0f/9.0f,
                -8.0f/9.0f, -2.0f/9.0f, 6.0f/9.0f, -8.0f/9.0f, 0.0f, 6.0f/9.0f, -8.0f/9.0f, 2.0f/9.0f, 6.0f/9.0f,
                -8.0f/9.0f, 4.0f/9.0f, 6.0f/9.0f, -8.0f/9.0f, 6.0f/9.0f, 6.0f/9.0f, -8.0f/9.0f, 8.0f/9.0f, 6.0f/9.0f,
                -8.0f/9.0f, -8.0f/9.0f, 8.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f, 8.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f, 8.0f/9.0f,
                -8.0f/9.0f, -2.0f/9.0f, 8.0f/9.0f, -8.0f/9.0f, 0.0f, 8.0f/9.0f, -8.0f/9.0f, 2.0f/9.0f, 8.0f/9.0f,
                -8.0f/9.0f, 4.0f/9.0f, 8.0f/9.0f, -8.0f/9.0f, 6.0f/9.0f, 8.0f/9.0f, -8.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f,
                -8.0f/9.0f, -8.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f, -4.0f/9.0f,
                -8.0f/9.0f, -6.0f/9.0f, -2.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f, 0.0f, -8.0f/9.0f, -6.0f/9.0f, 2.0f/9.0f,
                -8.0f/9.0f, -6.0f/9.0f, 4.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f, 6.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f, 8.0f/9.0f,
                -8.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f,
                -4.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f, 0.0f, -6.0f/9.0f, -6.0f/9.0f,
                2.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f,
                4.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f, 6.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f, 8.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f,
                -8.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f, -4.0f/9.0f, -4.0f/9.0f,
                -6.0f/9.0f, -2.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f, 0.0f, -4.0f/9.0f, -6.0f/9.0f, 2.0f/9.0f, -4.0f/9.0f,
                -6.0f/9.0f, 4.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f, 6.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f, 8.0f/9.0f, -4.0f/9.0f,
                -6.0f/9.0f, -8.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f, -4.0f/9.0f,
                -2.0f/9.0f, -6.0f/9.0f, -2.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f, 0.0f, -2.0f/9.0f, -6.0f/9.0f, 2.0f/9.0f,
                -2.0f/9.0f, -6.0f/9.0f, 4.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f, 6.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f, 8.0f/9.0f,
                -2.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f, 0.0f, -6.0f/9.0f, -6.0f/9.0f, 0.0f, -6.0f/9.0f, -4.0f/9.0f, 0.0f,
                -6.0f/9.0f, -2.0f/9.0f, 0.0f, -6.0f/9.0f, 0.0f, 0.0f, -6.0f/9.0f, 2.0f/9.0f, 0.0f, -6.0f/9.0f, 4.0f/9.0f,
                0.0f, -6.0f/9.0f, 6.0f/9.0f, 0.0f, -6.0f/9.0f, 8.0f/9.0f, 0.0f, -6.0f/9.0f, -8.0f/9.0f, 2.0f/9.0f,
                -6.0f/9.0f, -6.0f/9.0f, 2.0f/9.0f, -6.0f/9.0f, -4.0f/9.0f, 2.0f/9.0f, -6.0f/9.0f, -2.0f/9.0f, 2.0f/9.0f,
                -6.0f/9.0f, 0.0f, 2.0f/9.0f, -6.0f/9.0f, 2.0f/9.0f, 2.0f/9.0f, -6.0f/9.0f, 4.0f/9.0f, 2.0f/9.0f,
                -6.0f/9.0f, 6.0f/9.0f, 2.0f/9.0f, -6.0f/9.0f, 8.0f/9.0f, 2.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f, 4.0f/9.0f,
                -6.0f/9.0f, -6.0f/9.0f, 4.0f/9.0f, -6.0f/9.0f, -4.0f/9.0f, 4.0f/9.0f, -6.0f/9.0f, -2.0f/9.0f, 4.0f/9.0f,
                -6.0f/9.0f, 0.0f, 4.0f/9.0f, -6.0f/9.0f, 2.0f/9.0f, 4.0f/9.0f, -6.0f/9.0f, 4.0f/9.0f, 4.0f/9.0f,
                -6.0f/9.0f, 6.0f/9.0f, 4.0f/9.0f, -6.0f/9.0f, 8.0f/9.0f, 4.0f/9.0f, -6.0f/9.0f, -8.0f/
                                                                                                9.0f,
                6.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f, 6.0f/9.0f, -6.0f/9.0f
                , -4.0f/9.0f, 6.0f/9.0f, -6.0f/9.0f, -2.0f/9.0f, 6.0f/9.0f, -6.0f/9.0f, 0.0f, 6.0f/9.0f, -6.0f/9.0f,
                2.0f/9.0f, 6.0f/9.0f, -6.0f/9.0f, 4.0f/9.0f, 6.0f/9.0f, -6.0f/9.0f, 6.0f/9.0f, 6.0f/9.0f, -6.0f/9.0f,
                8.0f/9.0f, 6.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f, 8.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f, 8.0f/9.0f, -6.0f/9.0f,
                -4.0f/9.0f, 8.0f/9.0f, -6.0f/9.0f, -2.0f/9.0f, 8.0f/9.0f, -6.0f/9.0f, 0.0f, 8.0f/9.0f, -6.0f/9.0f,
                2.0f/9.0f, 8.0f/9.0f, -6.0f/9.0f, 4.0f/9.0f, 8.0f/9.0f, -6.0f/9.0f, 6.0f/9.0f, 8.0f/9.0f, -6.0f/9.0f,
                8.0f/9.0f, 8.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f,
                -4.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f, -2.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f, 0.0f, -8.0f/9.0f, -4.0f/9.0f,
                2.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f, 4.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f, 6.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f,
                8.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f,
                -4.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f, -4.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f, -4.0f/9.0f, 0.0f, -6.0f/9.0f,
                -4.0f/9.0f, 2.0f/9.0f, -6.0f/9.0f, -4.0f/9.0f, 4.0f/9.0f, -6.0f/9.0f, -4.0f/9.0f, 6.0f/9.0f, -6.0f/9.0f,
                -4.0f/9.0f, 8.0f/9.0f, -6.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f,
                -4.0f/9.0f, -4.0f/9.0f, -4.0f/9.0f, -4.0f/9.0f, -4.0f/9.0f, -2.0f/9.0f, -4.0f/9.0f, -4.0f/9.0f, 0.0f,
                -4.0f/9.0f, -4.0f/9.0f, 2.0f/9.0f, -4.0f/9.0f, -4.0f/9.0f, 4.0f/9.0f, -4.0f/9.0f, -4.0f/9.0f, 6.0f/9.0f,
                -4.0f/9.0f, -4.0f/9.0f, 8.0f/9.0f, -4.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f, -2.0f/9.0f, -4.0f/9.0f,
                -6.0f/9.0f, -2.0f/9.0f, -4.0f/9.0f, -4.0f/9.0f, -2.0f/9.0f, -4.0f/9.0f, -2.0f/9.0f, -2.0f/9.0f,
                -4.0f/9.0f, 0.0f, -2.0f/9.0f, -4.0f/9.0f,
                2.0f/9.0f, -2.0f/9.0f, -4.0f/9.0f, 4.0f/9.0f, -2.0f/9.0f, -4.0f/9.0f, 6.0f/9.0f, -2.0f/9.0f, -4.0f/9.0f,
                8.0f/9.0f, -2.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f, 0.0f, -4.0f/9.0f, -6.0f/9.0f, 0.0f, -4.0f/9.0f,
                -4.0f/9.0f, 0.0f, -4.0f/9.0f, -2.0f/9.0f, 0.0f, -4.0f/9.0f, 0.0f, 0.0f, -4.0f/9.0f, 2.0f/9.0f, 0.0f,
                -4.0f/9.0f, 4.0f/9.0f, 0.0f, -4.0f/9.0f, 6.0f/9.0f, 0.0f, -4.0f/9.0f, 8.0f/9.0f, 0.0f, -4.0f/9.0f,
                -8.0f/9.0f, 2.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f, 2.0f/9.0f, -4.0f/9.0f, -4.0f/9.0f, 2.0f/9.0f, -4.0f/9.0f,
                -2.0f/9.0f, 2.0f/9.0f, -4.0f/9.0f, 0.0f, 2.0f/9.0f, -4.0f/9.0f, 2.0f/9.0f, 2.0f/9.0f, -4.0f/9.0f,
                4.0f/9.0f, 2.0f/9.0f, -4.0f/9.0f, 6.0f/9.0f, 2.0f/9.0f, -4.0f/9.0f, 8.0f/9.0f, 2.0f/9.0f, -4.0f/9.0f,
                -8.0f/9.0f, 4.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f, 4.0f/9.0f, -4.0f/9.0f, -4.0f/9.0f, 4.0f/9.0f, -4.0f/9.0f,
                -2.0f/9.0f, 4.0f/9.0f, -4.0f/9.0f, 0.0f, 4.0f/9.0f, -4.0f/9.0f, 2.0f/9.0f, 4.0f/9.0f, -4.0f/9.0f,
                4.0f/9.0f, 4.0f/9.0f, -4.0f/9.0f, 6.0f/9.0f, 4.0f/9.0f, -4.0f/9.0f, 8.0f/9.0f, 4.0f/9.0f, -4.0f/9.0f,
                -8.0f/9.0f, 6.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f, 6.0f/9.0f, -4.0f/9.0f, -4.0f/9.0f, 6.0f/9.0f, -4.0f/9.0f,
                -2.0f/9.0f, 6.0f/9.0f, -4.0f/9.0f, 0.0f, 6.0f/9.0f, -4.0f/9.0f, 2.0f/9.0f, 6.0f/9.0f, -4.0f/9.0f,
                4.0f/9.0f, 6.0f/9.0f, -4.0f/9.0f, 6.0f/9.0f, 6.0f/9.0f, -4.0f/9.0f, 8.0f/9.0f, 6.0f/9.0f, -4.0f/9.0f,
                -8.0f/9.0f, 8.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f, 8.0f/9.0f, -4.0f/9.0f, -4.0f/9.0f, 8.0f/9.0f, -4.0f/9.0f,
                -2.0f/9.0f, 8.0f/9.0f, -4.0f/9.0f, 0.0f, 8.0f/9.0f, -4.0f/9.0f, 2.0f/9.0f, 8.0f/9.0f, -4.0f/9.0f,
                4.0f/9.0f, 8.0f/9.0f, -4.0f/9.0f, 6.0f/9.0f, 8.0f/9.0f, -4.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f, -4.0f/9.0f,
                -8.0f/9.0f, -8.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f,
                -8.0f/9.0f, -2.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f, -2.0f/9.0f, -2.0f/9.0f, -8.0f/9.0f, -2.0f/9.0f, 0.0f,
                -8.0f/9.0f, -2.0f/9.0f, 2.0f/9.0f, -8.0f/9.0f, -2.0f/9.0f, 4.0f/9.0f, -8.0f/9.0f, -2.0f/9.0f, 6.0f/9.0f,
                -8.0f/9.0f, -2.0f/9.0f, 8.0f/9.0f, -8.0f/9.0f, -2.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f, -2.0f/9.0f,
                -6.0f/9.0f, -6.0f/9.0f, -2.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f, -2.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f,
                -2.0f/9.0f, 0.0f, -6.0f/9.0f, -2.0f/9.0f, 2.0f/9.0f, -6.0f/9.0f, -2.0f/9.0f, 4.0f/9.0f, -6.0f/9.0f,
                -2.0f/9.0f, 6.0f/9.0f, -6.0f/9.0f, -2.0f/9.0f, 8.0f/9.0f, -6.0f/9.0f, -2.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f,
                -2.0f/9.0f, -6.0f/9.0f, -4.0f/9.0f, -2.0f/9.0f, -4.0f/9.0f, -4.0f/9.0f, -2.0f/9.0f, -2.0f/9.0f,
                -4.0f/9.0f, -2.0f/9.0f, 0.0f, -4.0f/9.0f, -2.0f/9.0f, 2.0f/9.0f, -4.0f/9.0f, -2.0f/9.0f, 4.0f/9.0f,
                -4.0f/9.0f, -2.0f/9.0f, 6.0f/9.0f, -4.0f/9.0f, -2.0f/9.0f, 8.0f/9.0f, -4.0f/9.0f, -2.0f/9.0f, -8.0f/9.0f,
                -2.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f, -2.0f/9.0f, -2.0f/9.0f, -4.0f/9.0f, -2.0f/9.0f, -2.0f/9.0f,
                -2.0f/9.0f, -2.0f/9.0f, -2.0f/9.0f, 0.0f, -2.0f/9.0f, -2.0f/9.0f, 2.0f/9.0f, -2.0f/9.0f, -2.0f/9.0f,
                4.0f/9.0f, -2.0f/9.0f, -2.0f/9.0f, 6.0f/9.0f, -2.0f/9.0f, -2.0f/9.0f, 8.0f/9.0f, -2.0f/9.0f, -2.0f/9.0f,
                -8.0f/9.0f, 0.0f, -2.0f/9.0f, -6.0f/9.0f, 0.0f, -2.0f/9.0f, -4.0f/9.0f, 0.0f, -2.0f/9.0f, -2.0f/9.0f,
                0.0f, -2.0f/9.0f, 0.0f, 0.0f, -2.0f/9.0f, 2.0f/9.0f, 0.0f, -2.0f/9.0f, 4.0f/9.0f, 0.0f, -2.0f/9.0f,
                6.0f/9.0f, 0.0f, -2.0f/9.0f, 8.0f/9.0f, 0.0f, -2.0f/9.0f, -8.0f/9.0f, 2.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f,
                2.0f/9.0f, -2.0f/9.0f, -4.0f/9.0f, 2.0f/9.0f, -2.0f/9.0f, -2.0f/9.0f, 2.0f/9.0f, -2.0f/9.0f, 0.0f,
                2.0f/9.0f, -2.0f/9.0f, 2.0f/9.0f, 2.0f
                                                  /9.0f,
                -2.0f/9.0f, 4.0f/9.0f, 2.0f/9.0f, -2.0f/9.0f, 6.0f/9.0f, 2.0f/9.0f, -2.0f/9.0f, 8.0f/9.0f, 2.0f/9.0f,
                -2.0f/9.0f, -8.0f/9.0f, 4.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f, 4.0f/9.0f, -2.0f/9.0f, -4.0f/9.0f, 4.0f/9.0f,
                -2.0f/9.0f, -2.0f/9.0f, 4.0f/9.0f, -2.0f/9.0f, 0.0f, 4.0f/9.0f, -2.0f/9.0f, 2.0f/9.0f, 4.0f/9.0f,
                -2.0f/9.0f, 4.0f/9.0f, 4.0f/9.0f, -2.0f/9.0f, 6.0f/9.0f, 4.0f/9.0f, -2.0f/9.0f, 8.0f/9.0f, 4.0f/9.0f,
                -2.0f/9.0f, -8.0f/9.0f, 6.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f, 6.0f/9.0f, -2.0f/9.0f, -4.0f/9.0f, 6.0f/9.0f,
                -2.0f/9.0f, -2.0f/9.0f, 6.0f/9.0f, -2.0f/9.0f, 0.0f, 6.0f/9.0f, -2.0f/9.0f, 2.0f/9.0f, 6.0f/9.0f,
                -2.0f/9.0f, 4.0f/9.0f, 6.0f/9.0f, -2.0f/9.0f, 6.0f/9.0f, 6.0f/9.0f, -2.0f/9.0f, 8.0f/9.0f, 6.0f/9.0f,
                -2.0f/9.0f, -8.0f/9.0f, 8.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f, 8.0f/9.0f, -2.0f/9.0f, -4.0f/9.0f, 8.0f/9.0f,
                -2.0f/9.0f, -2.0f/9.0f, 8.0f/9.0f, -2.0f/9.0f, 0.0f, 8.0f/9.0f, -2.0f/9.0f, 2.0f/9.0f, 8.0f/9.0f,
                -2.0f/9.0f, 4.0f/9.0f, 8.0f/9.0f, -2.0f/9.0f, 6.0f/9.0f, 8.0f/9.0f, -2.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f,
                -2.0f/9.0f, -8.0f/9.0f, -8.0f/9.0f, 0.0f, -6.0f/9.0f, -8.0f/9.0f, 0.0f, -4.0f/9.0f, -8.0f/9.0f, 0.0f,
                -2.0f/9.0f, -8.0f/9.0f, 0.0f, 0.0f, -8.0f/9.0f, 0.0f, 2.0f/9.0f, -8.0f/9.0f, 0.0f, 4.0f/9.0f, -8.0f/9.0f,
                0.0f, 6.0f/9.0f, -8.0f/9.0f, 0.0f, 8.0f/9.0f, -8.0f/9.0f, 0.0f, -8.0f/9.0f, -6.0f/9.0f, 0.0f, -6.0f/9.0f,
                -6.0f/9.0f, 0.0f, -4.0f/9.0f, -6.0f/9.0f, 0.0f, -2.0f/9.0f, -6.0f/9.0f, 0.0f, 0.0f, -6.0f/9.0f, 0.0f,
                2.0f/9.0f, -6.0f/9.0f, 0.0f, 4.0f/9.0f, -6.0f/9.0f, 0.0f, 6.0f/9.0f, -6.0f/9.0f, 0.0f, 8.0f/9.0f,
                -6.0f/9.0f, 0.0f, -8.0f/9.0f, -4.0f/9.0f, 0.0f, -6.0f/9.0f, -4.0f/9.0f, 0.0f, -4.0f/9.0f, -4.0f/9.0f,
                0.0f, -2.0f/9.0f, -4.0f/9.0f, 0.0f, 0.0f,
                -4.0f/9.0f, 0.0f,
                2.0f/9.0f, -4.0f/9.0f, 0.0f, 4.0f/9.0f, -4.0f/9.0f, 0.0f, 6.0f/9.0f, -4.0f/9.0f, 0.0f, 8.0f/9.0f,
                -4.0f/9.0f, 0.0f, -8.0f/9.0f, -2.0f/9.0f, 0.0f, -6.0f/9.0f, -2.0f/9.0f, 0.0f, -4.0f/9.0f, -2.0f/9.0f,
                0.0f, -2.0f/9.0f, -2.0f/9.0f, 0.0f, 0.0f, -2.0f/9.0f, 0.0f, 2.0f/9.0f, -2.0f/9.0f, 0.0f, 4.0f/9.0f,
                -2.0f/9.0f, 0.0f, 6.0f/9.0f, -2.0f/9.0f, 0.0f, 8.0f/9.0f, -2.0f/9.0f, 0.0f, -8.0f/9.0f, 0.0f, 0.0f,
                -6.0f/9.0f, 0.0f, 0.0f, -4.0f/9.0f, 0.0f, 0.0f, -2.0f/9.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 2.0f/9.0f,
                0.0f, 0.0f, 4.0f/9.0f, 0.0f, 0.0f, 6.0f/9.0f, 0.0f, 0.0f, 8.0f/9.0f, 0.0f, 0.0f, -8.0f/9.0f, 2.0f/9.0f,
                0.0f, -6.0f/9.0f, 2.0f/9.0f, 0.0f, -4.0f/9.0f, 2.0f/9.0f, 0.0f, -2.0f/9.0f, 2.0f/9.0f, 0.0f, 0.0f,
                2.0f/9.0f, 0.0f, 2.0f/9.0f, 2.0f/9.0f, 0.0f, 4.0f/9.0f, 2.0f/9.0f, 0.0f, 6.0f/9.0f, 2.0f/9.0f, 0.0f,
                8.0f/9.0f, 2.0f/9.0f, 0.0f, -8.0f/9.0f, 4.0f/9.0f, 0.0f, -6.0f/9.0f, 4.0f/9.0f, 0.0f, -4.0f/9.0f,
                4.0f/9.0f, 0.0f, -2.0f/9.0f, 4.0f/9.0f, 0.0f, 0.0f, 4.0f/9.0f, 0.0f, 2.0f/9.0f, 4.0f/9.0f, 0.0f,
                4.0f/9.0f, 4.0f/9.0f, 0.0f, 6.0f/9.0f, 4.0f/9.0f, 0.0f, 8.0f/9.0f, 4.0f/9.0f, 0.0f, -8.0f/9.0f,
                6.0f/9.0f, 0.0f, -6.0f/9.0f, 6.0f/9.0f, 0.0f, -4.0f/9.0f, 6.0f/9.0f, 0.0f, -2.0f/9.0f, 6.0f/9.0f, 0.0f,
                0.0f, 6.0f/9.0f, 0.0f, 2.0f/9.0f, 6.0f/9.0f, 0.0f, 4.0f/9.0f, 6.0f/9.0f, 0.0f, 6.0f/9.0f, 6.0f/9.0f,
                0.0f, 8.0f/9.0f, 6.0f/9.0f, 0.0f, -8.0f/9.0f, 8.0f/9.0f, 0.0f, -6.0f/9.0f, 8.0f/9.0f, 0.0f, -4.0f/9.0f,
                8.0f/9.0f, 0.0f, -2.0f/9.0f, 8.0f/9.0f, 0.0f, 0.0f, 8.0f/9.0f, 0.0f, 2.0f/9.0f, 8.0f/9.0f, 0.0f,
                4.0f/9.0f, 8.0f/9.0f, 0.0f, 6.0f/9.0f, 8.0f/9.0f, 0.0f, 8.0f/9.0f, 8.0f/9.0f, 0.0f, -8.0f/9.0f,
                -8.0f/9.0f, 2.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f, 2.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f, 2.0f/9.0f, -2.0f/9.0f,
                -8.0f/9.0f, 2.0f/9.0f, 0.0f, -8.0f
                                             /9.0f,
                2.0f/9.0f, 2.0f/9.0f, -8.0f/9.0f, 2.0f/9.0f, 4.0f/9.0f, -8.0f/9.0f, 2.0f/9.0f, 6.0f/9.0f, -8.0f/9.0f,
                2.0f/9.0f, 8.0f/9.0f, -8.0f/9.0f, 2.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f, 2.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f,
                2.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f, 2.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f, 2.0f/9.0f, 0.0f, -6.0f/9.0f,
                2.0f/9.0f, 2.0f/9.0f, -6.0f/9.0f, 2.0f/9.0f, 4.0f/9.0f, -6.0f/9.0f, 2.0f/9.0f, 6.0f/9.0f, -6.0f/9.0f,
                2.0f/9.0f, 8.0f/9.0f, -6.0f/9.0f, 2.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f, 2.0f/9.0f, -6.0f/9.0f, -4.0f/9.0f,
                2.0f/9.0f, -4.0f/9.0f, -4.0f/9.0f, 2.0f/9.0f, -2.0f/9.0f, -4.0f/9.0f, 2.0f/9.0f, 0.0f, -4.0f/9.0f,
                2.0f/9.0f, 2.0f/9.0f, -4.0f/9.0f, 2.0f/9.0f, 4.0f/9.0f, -4.0f/9.0f, 2.0f/9.0f, 6.0f/9.0f, -4.0f/9.0f,
                2.0f/9.0f, 8.0f/9.0f, -4.0f/9.0f, 2.0f/9.0f, -8.0f/9.0f, -2.0f/9.0f, 2.0f/9.0f, -6.0f/9.0f, -2.0f/9.0f,
                2.0f/9.0f, -4.0f/9.0f, -2.0f/9.0f, 2.0f/9.0f, -2.0f/9.0f, -2.0f/9.0f, 2.0f/9.0f, 0.0f, -2.0f/9.0f,
                2.0f/9.0f, 2.0f/9.0f, -2.0f/9.0f, 2.0f/9.0f, 4.0f/9.0f, -2.0f/9.0f, 2.0f/9.0f, 6.0f/9.0f, -2.0f/9.0f,
                2.0f/9.0f, 8.0f/9.0f, -2.0f/9.0f, 2.0f/9.0f, -8.0f/9.0f, 0.0f, 2.0f/9.0f, -6.0f/9.0f, 0.0f, 2.0f/9.0f,
                -4.0f/9.0f, 0.0f, 2.0f/9.0f, -2.0f/9.0f, 0.0f, 2.0f/9.0f, 0.0f, 0.0f, 2.0f/9.0f, 2.0f/9.0f, 0.0f,
                2.0f/9.0f, 4.0f/9.0f, 0.0f, 2.0f/9.0f, 6.0f/9.0f, 0.0f, 2.0f/9.0f, 8.0f/9.0f, 0.0f, 2.0f/9.0f,
                -8.0f/9.0f, 2.0f/9.0f, 2.0f/9.0f, -6.0f/9.0f, 2.0f/9.0f, 2.0f/9.0f, -4.0f/9.0f, 2.0f/9.0f, 2.0f/9.0f,
                -2.0f/9.0f, 2.0f/9.0f, 2.0f/9.0f, 0.0f, 2.0f/9.0f, 2.0f/9.0f, 2.0f/9.0f, 2.0f/9.0f, 2.0f/9.0f, 4.0f/9.0f,
                2.0f/9.0f, 2.0f/9.0f, 6.0f/9.0f, 2.0f/9.0f, 2.0f/9.0f, 8.0f/9.0f, 2.0f/9.0f, 2.0f/9.0f, -8.0f/9.0f,
                4.0f/9.0f, 2.0f/9.0f, -6.0f/9.0f, 4.0f/9.0f, 2.0f/9.0f, -4.0f
                                                                        /9.0f,
                4.0f/9.0f, 2.0f/9.0f, -2.0f/9.0f, 4.0f/9.0f, 2.0f/9.0f, 0.0f, 4.0f/9.0f, 2.0f/9.0f, 2.0f/9.0f, 4.0f/9.0f,
                2.0f/9.0f, 4.0f/9.0f, 4.0f/9.0f, 2.0f/9.0f, 6.0f/9.0f, 4.0f/9.0f, 2.0f/9.0f, 8.0f/9.0f, 4.0f/9.0f,
                2.0f/9.0f, -8.0f/9.0f, 6.0f/9.0f, 2.0f/9.0f, -6.0f/9.0f, 6.0f/9.0f, 2.0f/9.0f, -4.0f/9.0f, 6.0f/9.0f,
                2.0f/9.0f, -2.0f/9.0f, 6.0f/9.0f, 2.0f/9.0f, 0.0f, 6.0f/9.0f, 2.0f/9.0f, 2.0f/9.0f, 6.0f/9.0f, 2.0f/9.0f,
                4.0f/9.0f, 6.0f/9.0f, 2.0f/9.0f, 6.0f/9.0f, 6.0f/9.0f, 2.0f/9.0f, 8.0f/9.0f, 6.0f/9.0f, 2.0f/9.0f,
                -8.0f/9.0f, 8.0f/9.0f, 2.0f/9.0f, -6.0f/9.0f, 8.0f/9.0f, 2.0f/9.0f, -4.0f/9.0f, 8.0f/9.0f, 2.0f/9.0f,
                -2.0f/9.0f, 8.0f/9.0f, 2.0f/9.0f, 0.0f, 8.0f/9.0f, 2.0f/9.0f, 2.0f/9.0f, 8.0f/9.0f, 2.0f/9.0f, 4.0f/9.0f,
                8.0f/9.0f, 2.0f/9.0f, 6.0f/9.0f, 8.0f/9.0f, 2.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f, 2.0f/9.0f, -8.0f/9.0f,
                -8.0f/9.0f, 4.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f, 4.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f, 4.0f/9.0f, -2.0f/9.0f,
                -8.0f/9.0f, 4.0f/9.0f, 0.0f, -8.0f/9.0f, 4.0f/9.0f, 2.0f/9.0f, -8.0f/9.0f, 4.0f/9.0f, 4.0f/9.0f,
                -8.0f/9.0f, 4.0f/9.0f, 6.0f/9.0f, -8.0f/9.0f, 4.0f/9.0f, 8.0f/9.0f, -8.0f/9.0f, 4.0f/9.0f, -8.0f/9.0f,
                -6.0f/9.0f, 4.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f, 4.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f, 4.0f/9.0f, -2.0f/9.0f,
                -6.0f/9.0f, 4.0f/9.0f, 0.0f, -6.0f/9.0f, 4.0f/9.0f, 2.0f/9.0f, -6.0f/9.0f, 4.0f/9.0f, 4.0f/9.0f,
                -6.0f/9.0f, 4.0f/9.0f, 6.0f/9.0f, -6.0f/9.0f, 4.0f/9.0f, 8.0f/9.0f, -6.0f/9.0f, 4.0f/9.0f, -8.0f/9.0f,
                -4.0f/9.0f, 4.0f/9.0f, -6.0f/9.0f, -4.0f/9.0f, 4.0f/9.0f, -4.0f/9.0f, -4.0f/9.0f, 4.0f/9.0f, -2.0f/9.0f,
                -4.0f/9.0f, 4.0f/9.0f, 0.0f, -4.0f/9.0f, 4.0f/9.0f, 2.0f/9.0f, -4.0f/9.0f, 4.0f/9.0f, 4.0f/9.0f,
                -4.0f/9.0f, 4.0f/9.0f, 6.0f/9.0f, -4.0f/9.0f,
                4.0f/9.0f, 8.0f/9.0f, -4.0f/9.0f, 4.0f/9.0f, -8.0f/9.0f, -2.0f/9.0f, 4.0f/9.0f, -6.0f/9.0f, -2.0f/9.0f,
                4.0f/9.0f, -4.0f/9.0f, -2.0f/9.0f, 4.0f/9.0f, -2.0f/9.0f, -2.0f/9.0f, 4.0f/9.0f, 0.0f, -2.0f/9.0f,
                4.0f/9.0f, 2.0f/9.0f, -2.0f/9.0f, 4.0f/9.0f, 4.0f/9.0f, -2.0f/9.0f, 4.0f/9.0f, 6.0f/9.0f, -2.0f/9.0f,
                4.0f/9.0f, 8.0f/9.0f, -2.0f/9.0f, 4.0f/9.0f, -8.0f/9.0f, 0.0f, 4.0f/9.0f, -6.0f/9.0f, 0.0f, 4.0f/9.0f,
                -4.0f/9.0f, 0.0f, 4.0f/9.0f, -2.0f/9.0f, 0.0f, 4.0f/9.0f, 0.0f, 0.0f, 4.0f/9.0f, 2.0f/9.0f, 0.0f,
                4.0f/9.0f, 4.0f/9.0f, 0.0f, 4.0f/9.0f, 6.0f/9.0f, 0.0f, 4.0f/9.0f, 8.0f/9.0f, 0.0f, 4.0f/9.0f,
                -8.0f/9.0f, 2.0f/9.0f, 4.0f/9.0f, -6.0f/9.0f, 2.0f/9.0f, 4.0f/9.0f, -4.0f/9.0f, 2.0f/9.0f, 4.0f/9.0f,
                -2.0f/9.0f, 2.0f/9.0f, 4.0f/9.0f, 0.0f, 2.0f/9.0f, 4.0f/9.0f, 2.0f/9.0f, 2.0f/9.0f, 4.0f/9.0f, 4.0f/9.0f,
                2.0f/9.0f, 4.0f/9.0f, 6.0f/9.0f, 2.0f/9.0f, 4.0f/9.0f, 8.0f/9.0f, 2.0f/9.0f, 4.0f/9.0f, -8.0f/9.0f,
                4.0f/9.0f, 4.0f/9.0f, -6.0f/9.0f, 4.0f/9.0f, 4.0f/9.0f, -4.0f/9.0f, 4.0f/9.0f, 4.0f/9.0f, -2.0f/9.0f,
                4.0f/9.0f, 4.0f/9.0f, 0.0f, 4.0f/9.0f, 4.0f/9.0f, 2.0f/9.0f, 4.0f/9.0f, 4.0f/9.0f, 4.0f/9.0f, 4.0f/9.0f,
                4.0f/9.0f, 6.0f/9.0f, 4.0f/9.0f, 4.0f/9.0f, 8.0f/9.0f, 4.0f/9.0f, 4.0f/9.0f, -8.0f/9.0f, 6.0f/9.0f,
                4.0f/9.0f, -6.0f/9.0f, 6.0f/9.0f, 4.0f/9.0f, -4.0f/9.0f, 6.0f/9.0f, 4.0f/9.0f, -2.0f/9.0f, 6.0f/9.0f,
                4.0f/9.0f, 0.0f, 6.0f/9.0f, 4.0f/9.0f, 2.0f/9.0f, 6.0f/9.0f, 4.0f/9.0f, 4.0f/9.0f, 6.0f/9.0f, 4.0f/9.0f,
                6.0f/9.0f, 6.0f/9.0f, 4.0f/9.0f, 8.0f/9.0f, 6.0f/9.0f, 4.0f/9.0f, -8.0f/9.0f, 8.0f/9.0f, 4.0f/9.0f,
                -6.0f/9.0f, 8.0f/9.0f, 4.0f/9.0f, -4.0f/9.0f, 8.0f/9.0f, 4.0f/9.0f, -2.0f/9.0f, 8.0f/9.0f, 4.0f/9.0f,
                0.0f, 8.0f/9.0f, 4.0f/9.0f, 2.0f/9.0f, 8.0f/9.0f, 4.0f/9.0f, 4.0f/9.0f, 8.0f/
                                                                                        9.0f,
                4.0f/9.0f, 6.0f/9.0f, 8.0f/9.0f, 4.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f, 4.0f/9.0f, -8.0f/9.0f, -8.0f/9.0f,
                6.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f, 6.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f, 6.0f/9.0f, -2.0f/9.0f, -8.0f/9.0f,
                6.0f/9.0f, 0.0f, -8.0f/9.0f, 6.0f/9.0f, 2.0f/9.0f, -8.0f/9.0f, 6.0f/9.0f, 4.0f/9.0f, -8.0f/9.0f,
                6.0f/9.0f, 6.0f/9.0f, -8.0f/9.0f, 6.0f/9.0f, 8.0f/9.0f, -8.0f/9.0f, 6.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f,
                6.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f, 6.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f, 6.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f,
                6.0f/9.0f, 0.0f, -6.0f/9.0f, 6.0f/9.0f, 2.0f/9.0f, -6.0f/9.0f, 6.0f/9.0f, 4.0f/9.0f, -6.0f/9.0f,
                6.0f/9.0f, 6.0f/9.0f, -6.0f/9.0f, 6.0f/9.0f, 8.0f/9.0f, -6.0f/9.0f, 6.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f,
                6.0f/9.0f, -6.0f/9.0f, -4.0f/9.0f, 6.0f/9.0f, -4.0f/9.0f, -4.0f/9.0f, 6.0f/9.0f, -2.0f/9.0f, -4.0f/9.0f,
                6.0f/9.0f, 0.0f, -4.0f/9.0f, 6.0f/9.0f, 2.0f/9.0f, -4.0f/9.0f, 6.0f/9.0f, 4.0f/9.0f, -4.0f/9.0f,
                6.0f/9.0f, 6.0f/9.0f, -4.0f/9.0f, 6.0f/9.0f, 8.0f/9.0f, -4.0f/9.0f, 6.0f/9.0f, -8.0f/9.0f, -2.0f/9.0f,
                6.0f/9.0f, -6.0f/9.0f, -2.0f/9.0f, 6.0f/9.0f, -4.0f/9.0f, -2.0f/9.0f, 6.0f/9.0f, -2.0f/9.0f, -2.0f/9.0f,
                6.0f/9.0f, 0.0f, -2.0f/9.0f, 6.0f/9.0f, 2.0f/9.0f, -2.0f/9.0f, 6.0f/9.0f, 4.0f/9.0f, -2.0f/9.0f,
                6.0f/9.0f, 6.0f/9.0f, -2.0f/9.0f, 6.0f/9.0f, 8.0f/9.0f, -2.0f/9.0f, 6.0f/9.0f, -8.0f/9.0f, 0.0f,
                6.0f/9.0f, -6.0f/9.0f, 0.0f, 6.0f/9.0f, -4.0f/9.0f, 0.0f, 6.0f/9.0f, -2.0f/9.0f, 0.0f, 6.0f/9.0f, 0.0f,
                0.0f, 6.0f/9.0f, 2.0f/9.0f, 0.0f, 6.0f/9.0f, 4.0f/9.0f, 0.0f, 6.0f/9.0f, 6.0f/9.0f, 0.0f, 6.0f/9.0f,
                8.0f/9.0f, 0.0f, 6.0f/9.0f, -8.0f/9.0f, 2.0f/9.0f, 6.0f/9.0f, -6.0f/9.0f, 2.0f/9.0f, 6.0f/9.0f,
                -4.0f/9.0f, 2.0f/9.0f, 6.0f/9.0f, -2.0f/9.0f, 2.0f/9.0f, 6.0f/
                                                                         9.0f,
                0.0f, 2.0f/9.0f, 6.0f/9.0f, 2.0f/9.0f, 2.0f/9.0f, 6.0f/9.0f, 4.0f/9.0f, 2.0f/9.0f, 6.0f/9.0f, 6.0f/9.0f,
                2.0f/9.0f, 6.0f/9.0f, 8.0f/9.0f, 2.0f/9.0f, 6.0f/9.0f, -8.0f/9.0f, 4.0f/9.0f, 6.0f/9.0f, -6.0f/9.0f,
                4.0f/9.0f, 6.0f/9.0f, -4.0f/9.0f, 4.0f/9.0f, 6.0f/9.0f, -2.0f/9.0f, 4.0f/9.0f, 6.0f/9.0f, 0.0f,
                4.0f/9.0f, 6.0f/9.0f, 2.0f/9.0f, 4.0f/9.0f, 6.0f/9.0f, 4.0f/9.0f, 4.0f/9.0f, 6.0f/9.0f, 6.0f/9.0f,
                4.0f/9.0f, 6.0f/9.0f, 8.0f/9.0f, 4.0f/9.0f, 6.0f/9.0f, -8.0f/9.0f, 6.0f/9.0f, 6.0f/9.0f, -6.0f/9.0f,
                6.0f/9.0f, 6.0f/9.0f, -4.0f/9.0f, 6.0f/9.0f, 6.0f/9.0f, -2.0f/9.0f, 6.0f/9.0f, 6.0f/9.0f, 0.0f,
                6.0f/9.0f, 6.0f/9.0f, 2.0f/9.0f, 6.0f/9.0f, 6.0f/9.0f, 4.0f/9.0f, 6.0f/9.0f, 6.0f/9.0f, 6.0f/9.0f,
                6.0f/9.0f, 6.0f/9.0f, 8.0f/9.0f, 6.0f/9.0f, 6.0f/9.0f, -8.0f/9.0f, 8.0f/9.0f, 6.0f/9.0f, -6.0f/9.0f,
                8.0f/9.0f, 6.0f/9.0f, -4.0f/9.0f, 8.0f/9.0f, 6.0f/9.0f, -2.0f/9.0f, 8.0f/9.0f, 6.0f/9.0f, 0.0f,
                8.0f/9.0f, 6.0f/9.0f, 2.0f/9.0f, 8.0f/9.0f, 6.0f/9.0f, 4.0f/9.0f, 8.0f/9.0f, 6.0f/9.0f, 6.0f/9.0f,
                8.0f/9.0f, 6.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f, 6.0f/9.0f, -8.0f/9.0f, -8.0f/9.0f, 8.0f/9.0f, -6.0f/9.0f,
                -8.0f/9.0f, 8.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f, 8.0f/9.0f, -2.0f/9.0f, -8.0f/9.0f, 8.0f/9.0f, 0.0f,
                -8.0f/9.0f, 8.0f/9.0f, 2.0f/9.0f, -8.0f/9.0f, 8.0f/9.0f, 4.0f/9.0f, -8.0f/9.0f, 8.0f/9.0f, 6.0f/9.0f,
                -8.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f, -8.0f/9.0f, 8.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f, 8.0f/9.0f, -6.0f/9.0f,
                -6.0f/9.0f, 8.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f, 8.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f, 8.0f/9.0f, 0.0f,
                -6.0f/9.0f, 8.0f/9.0f, 2.0f/9.0f, -6.0f/9.0f, 8.0f/9.0f, 4.0f/9.0f, -6.0f/9.0f, 8.0f/9.0f, 6.0f/9.0f,
                -6.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f, -6.0f/9.0f, 8.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f, 8.0f
                                                                                                 /9.0f,
                -6.0f/9.0f, -4.0f/9.0f, 8.0f/9.0f, -4.0f/9.0f, -4.0f/9.0f, 8.0f/9.0f, -2.0f/9.0f, -4.0f/9.0f, 8.0f/9.0f,
                0.0f, -4.0f/9.0f, 8.0f/9.0f, 2.0f/9.0f, -4.0f/9.0f, 8.0f/9.0f, 4.0f/9.0f, -4.0f/9.0f, 8.0f/9.0f,
                6.0f/9.0f, -4.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f, -4.0f/9.0f, 8.0f/9.0f, -8.0f/9.0f, -2.0f/9.0f, 8.0f/9.0f,
                -6.0f/9.0f, -2.0f/9.0f, 8.0f/9.0f, -4.0f/9.0f, -2.0f/9.0f, 8.0f/9.0f, -2.0f/9.0f, -2.0f/9.0f, 8.0f/9.0f,
                0.0f, -2.0f/9.0f, 8.0f/9.0f, 2.0f/9.0f, -2.0f/9.0f, 8.0f/9.0f, 4.0f/9.0f, -2.0f/9.0f, 8.0f/9.0f,
                6.0f/9.0f, -2.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f, -2.0f/9.0f, 8.0f/9.0f, -8.0f/9.0f, 0.0f, 8.0f/9.0f,
                -6.0f/9.0f, 0.0f, 8.0f/9.0f, -4.0f/9.0f, 0.0f, 8.0f/9.0f, -2.0f/9.0f, 0.0f, 8.0f/9.0f, 0.0f, 0.0f,
                8.0f/9.0f, 2.0f/9.0f, 0.0f, 8.0f/9.0f, 4.0f/9.0f, 0.0f, 8.0f/9.0f, 6.0f/9.0f, 0.0f, 8.0f/9.0f, 8.0f/9.0f,
                0.0f, 8.0f/9.0f, -8.0f/9.0f, 2.0f/9.0f, 8.0f/9.0f, -6.0f/9.0f, 2.0f/9.0f, 8.0f/9.0f, -4.0f/9.0f,
                2.0f/9.0f, 8.0f/9.0f, -2.0f/9.0f, 2.0f/9.0f, 8.0f/9.0f, 0.0f, 2.0f/9.0f, 8.0f/9.0f, 2.0f/9.0f, 2.0f/9.0f,
                8.0f/9.0f, 4.0f/9.0f, 2.0f/9.0f, 8.0f/9.0f, 6.0f/9.0f, 2.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f, 2.0f/9.0f,
                8.0f/9.0f, -8.0f/9.0f, 4.0f/9.0f, 8.0f/9.0f, -6.0f/9.0f, 4.0f/9.0f, 8.0f/9.0f, -4.0f/9.0f, 4.0f/9.0f,
                8.0f/9.0f, -2.0f/9.0f, 4.0f/9.0f, 8.0f/9.0f, 0.0f, 4.0f/9.0f, 8.0f/9.0f, 2.0f/9.0f, 4.0f/9.0f, 8.0f/9.0f,
                4.0f/9.0f, 4.0f/9.0f, 8.0f/9.0f, 6.0f/9.0f, 4.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f, 4.0f/9.0f, 8.0f/9.0f,
                -8.0f/9.0f, 6.0f/9.0f, 8.0f/9.0f, -6.0f/9.0f, 6.0f/9.0f, 8.0f/9.0f, -4.0f/9.0f, 6.0f/9.0f, 8.0f/9.0f,
                -2.0f/9.0f, 6.0f/9.0f, 8.0f/9.0f, 0.0f, 6.0f/9.0f, 8.0f/9.0f, 2.0f/9.0f, 6.0f/9.0f, 8.0f/9.0f, 4.0f/9.0f,
                6.0f/9.0f, 8.0f/9.0f, 6.0f/9.0f, 6.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f,
                6.0f/9.0f, 8.0f/9.0f, -8.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f, -6.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f, -4.0f/9.0f,
                8.0f/9.0f, 8.0f/9.0f, -2.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f, 0.0f, 8.0f/9.0f, 8.0f/9.0f, 2.0f/9.0f, 8.0f/9.0f,
                8.0f/9.0f, 4.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f, 6.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f,
                8.0f/9.0f
            };

        // data taken from ISO/IEC DIS 11172, Annexes 3-B.2[abcd] and 3-B.4:

        // subbands 0-2 in tables 3-B.2a and 2b: (index is allocation)
        public static readonly int[] table_ab1_codelength = { 0, 5, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };

        public static readonly float[][] table_ab1_groupingtables =
            {
                null, grouping_5bits, null, null, null, null,
                null, null, null, null, null, null, null, null, null, null
            };

        public static readonly float[] table_ab1_factor =
            {
                0.0f, 1.0f/2.0f, 1.0f/4.0f, 1.0f/8.0f, 1.0f/16.0f, 1.0f/32.0f, 1.0f/64.0f, 1.0f/128.0f, 1.0f/256.0f,
                1.0f/512.0f, 1.0f/1024.0f, 1.0f/2048.0f, 1.0f/4096.0f, 1.0f/8192.0f, 1.0f/16384.0f, 1.0f/32768.0f
            };

        public static readonly float[] table_ab1_c =
            {
                0.0f, 1.33333333333f, 1.14285714286f, 1.06666666666f, 1.03225806452f, 1.01587301587f, 1.00787401575f,
                1.00392156863f, 1.00195694716f, 1.00097751711f, 1.00048851979f, 1.00024420024f, 1.00012208522f,
                1.00006103888f, 1.00003051851f, 1.00001525902f
            };

        public static readonly float[] table_ab1_d =
            {
                0.0f, 0.50000000000f, 0.25000000000f, 0.12500000000f, 0.06250000000f, 0.03125000000f, 0.01562500000f,
                0.00781250000f, 0.00390625000f, 0.00195312500f, 0.00097656250f, 0.00048828125f, 0.00024414063f,
                0.00012207031f, 0.00006103516f, 0.00003051758f
            };

        // subbands 3-... tables 3-B.2a and 2b:
        public static readonly float[][] table_ab234_groupingtables =
            {
                null, grouping_5bits, grouping_7bits, null,
                grouping_10bits, null, null, null, null, null, null, null, null, null, null, null
            };

        // subbands 3-10 in tables 3-B.2a and 2b:
        public static readonly int[] table_ab2_codelength = { 0, 5, 7, 3, 10, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16 };

        public static readonly float[] table_ab2_factor =
            {
                0.0f, 1.0f/2.0f, 1.0f/4.0f, 1.0f/4.0f, 1.0f/8.0f, 1.0f/8.0f, 1.0f/16.0f, 1.0f/32.0f, 1.0f/64.0f,
                1.0f/128.0f, 1.0f/256.0f, 1.0f/512.0f, 1.0f/1024.0f, 1.0f/2048.0f, 1.0f/4096.0f, 1.0f/32768.0f
            };

        public static readonly float[] table_ab2_c =
            {
                0.0f, 1.33333333333f, 1.60000000000f, 1.14285714286f, 1.77777777777f, 1.06666666666f, 1.03225806452f,
                1.01587301587f, 1.00787401575f, 1.00392156863f, 1.00195694716f, 1.00097751711f, 1.00048851979f,
                1.00024420024f, 1.00012208522f, 1.00001525902f
            };

        public static readonly float[] table_ab2_d =
            {
                0.0f, 0.50000000000f, 0.50000000000f, 0.25000000000f, 0.50000000000f, 0.12500000000f, 0.06250000000f,
                0.03125000000f, 0.01562500000f, 0.00781250000f, 0.00390625000f, 0.00195312500f, 0.00097656250f,
                0.00048828125f, 0.00024414063f, 0.00003051758f
            };

        // subbands 11-22 in tables 3-B.2a and 2b:
        public static readonly int[] table_ab3_codelength = { 0, 5, 7, 3, 10, 4, 5, 16 };

        public static readonly float[] table_ab3_factor =
            {
                0.0f, 1.0f/2.0f, 1.0f/4.0f, 1.0f/4.0f, 1.0f/8.0f,
                1.0f/8.0f, 1.0f/16.0f, 1.0f/32768.0f
            };

        public static readonly float[] table_ab3_c =
            {
                0.0f, 1.33333333333f, 1.60000000000f, 1.14285714286f, 1.77777777777f, 1.06666666666f, 1.03225806452f,
                1.00001525902f
            };

        public static readonly float[] table_ab3_d =
            {
                0.0f, 0.50000000000f, 0.50000000000f, 0.25000000000f, 0.50000000000f, 0.12500000000f, 0.06250000000f,
                0.00003051758f
            };

        // subbands 23-... in tables 3-B.2a and 2b:
        public static readonly int[] table_ab4_codelength = { 0, 5, 7, 16 };
        public static readonly float[] table_ab4_factor = { 0.0f, 1.0f / 2.0f, 1.0f / 4.0f, 1.0f / 32768.0f };
        public static readonly float[] table_ab4_c = { 0.0f, 1.33333333333f, 1.60000000000f, 1.00001525902f };
        public static readonly float[] table_ab4_d = { 0.0f, 0.50000000000f, 0.50000000000f, 0.00003051758f };
        // subbands in tables 3-B.2c and 2d:
        public static readonly int[] table_cd_codelength = { 0, 5, 7, 10, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 };

        public static readonly float[][] table_cd_groupingtables =
            {
                null, grouping_5bits, grouping_7bits,
                grouping_10bits, null, null, null, null, null, null, null, null, null, null, null, null
            };

        public static readonly float[] table_cd_factor =
            {
                0.0f, 1.0f/2.0f, 1.0f/4.0f, 1.0f/8.0f, 1.0f/8.0f, 1.0f/16.0f, 1.0f/32.0f, 1.0f/64.0f, 1.0f/128.0f,
                1.0f/256.0f, 1.0f/512.0f, 1.0f/1024.0f, 1.0f/2048.0f, 1.0f/4096.0f, 1.0f/8192.0f, 1.0f/16384.0f
            };

        public static readonly float[] table_cd_c =
            {
                0.0f, 1.33333333333f, 1.60000000000f, 1.77777777777f, 1.06666666666f, 1.03225806452f, 1.01587301587f,
                1.00787401575f, 1.00392156863f, 1.00195694716f, 1.00097751711f, 1.00048851979f, 1.00024420024f,
                1.00012208522f, 1.00006103888f, 1.00003051851f
            };

        public static readonly float[] table_cd_d =
            {
                0.0f, 0.50000000000f, 0.50000000000f, 0.50000000000f, 0.12500000000f, 0.06250000000f, 0.03125000000f,
                0.01562500000f, 0.00781250000f, 0.00390625000f, 0.00195312500f, 0.00097656250f, 0.00048828125f,
                0.00024414063f, 0.00012207031f, 0.00006103516f
            };

        protected internal int allocation;
        protected internal float[] c = { 0 };
        protected internal int[] codelength = { 0 };
        protected internal float[] d = { 0 };
        //protected float[][] 		groupingtable = {{0},{0}} ;
        protected internal float[] factor = { 0.0f };
        protected internal float[][] groupingtable;
        protected internal int groupnumber;
        protected internal int samplenumber;
        protected internal float[] samples;
        protected internal float scalefactor1, scalefactor2, scalefactor3;
        protected internal int scfsi;
        protected internal int subbandnumber;

        /// <summary>
        ///     Constructor
        /// </summary>
        public SubbandLayer2(int subbandnumber)
        {
            this.subbandnumber = subbandnumber;
            groupnumber = samplenumber = 0;
        }

        private void InitBlock()
        {
            samples = new float[3];
            groupingtable = new float[2][];
        }

        /// <summary>
        ///     *
        /// </summary>
        protected internal virtual int get_allocationlength(Header header)
        {
            if (header.version() == Header.MPEG1)
            {
                int channel_bitrate = header.bitrate_index();

                // calculate bitrate per channel:
                if (header.mode() != Header.SINGLE_CHANNEL)
                    if (channel_bitrate == 4)
                        channel_bitrate = 1;
                    else
                        channel_bitrate -= 4;

                if (channel_bitrate == 1 || channel_bitrate == 2)
                    // table 3-B.2c or 3-B.2d
                    if (subbandnumber <= 1)
                        return 4;
                    else
                        return 3;
                // tables 3-B.2a or 3-B.2b
                if (subbandnumber <= 10)
                    return 4;
                if (subbandnumber <= 22)
                    return 3;
                return 2;
            }
            // MPEG-2 LSF -- Jeff

            // table B.1 of ISO/IEC 13818-3
            if (subbandnumber <= 3)
                return 4;
            if (subbandnumber <= 10)
                return 3;
            return 2;
        }

        /// <summary>
        ///     *
        /// </summary>
        protected internal virtual void prepare_sample_reading(Header header, int allocation, int channel,
            float[] factor, int[] codelength, float[] c, float[] d)
        {
            int channel_bitrate = header.bitrate_index();
            // calculate bitrate per channel:
            if (header.mode() != Header.SINGLE_CHANNEL)
                if (channel_bitrate == 4)
                    channel_bitrate = 1;
                else
                    channel_bitrate -= 4;

            if (channel_bitrate == 1 || channel_bitrate == 2)
            {
                // table 3-B.2c or 3-B.2d
                groupingtable[channel] = table_cd_groupingtables[allocation];
                factor[0] = table_cd_factor[allocation];
                codelength[0] = table_cd_codelength[allocation];
                c[0] = table_cd_c[allocation];
                d[0] = table_cd_d[allocation];
            }
            else
            {
                // tables 3-B.2a or 3-B.2b
                if (subbandnumber <= 2)
                {
                    groupingtable[channel] = table_ab1_groupingtables[allocation];
                    factor[0] = table_ab1_factor[allocation];
                    codelength[0] = table_ab1_codelength[allocation];
                    c[0] = table_ab1_c[allocation];
                    d[0] = table_ab1_d[allocation];
                }
                else
                {
                    groupingtable[channel] = table_ab234_groupingtables[allocation];
                    if (subbandnumber <= 10)
                    {
                        factor[0] = table_ab2_factor[allocation];
                        codelength[0] = table_ab2_codelength[allocation];
                        c[0] = table_ab2_c[allocation];
                        d[0] = table_ab2_d[allocation];
                    }
                    else if (subbandnumber <= 22)
                    {
                        factor[0] = table_ab3_factor[allocation];
                        codelength[0] = table_ab3_codelength[allocation];
                        c[0] = table_ab3_c[allocation];
                        d[0] = table_ab3_d[allocation];
                    }
                    else
                    {
                        factor[0] = table_ab4_factor[allocation];
                        codelength[0] = table_ab4_codelength[allocation];
                        c[0] = table_ab4_c[allocation];
                        d[0] = table_ab4_d[allocation];
                    }
                }
            }
        }

        /// <summary>
        ///     *
        /// </summary>
        public override void ReadBitAllocation(IBitstream stream, Header header, Crc16 crc)
        {
            int length = get_allocationlength(header);
            allocation = stream.GetBitsFromBuffer(length);
            if (crc != null)
                crc.add_bits(allocation, length);
        }

        /// <summary>
        ///     *
        /// </summary>
        public virtual void read_scalefactor_selection(IBitstream stream, Crc16 crc)
        {
            if (allocation != 0)
            {
                scfsi = stream.GetBitsFromBuffer(2);
                if (crc != null)
                    crc.add_bits(scfsi, 2);
            }
        }

        /// <summary>
        ///     *
        /// </summary>
        public override void ReadScaleFactor(IBitstream stream, Header header)
        {
            if (allocation != 0)
            {
                switch (scfsi)
                {
                    case 0:
                        scalefactor1 = ScaleFactors[stream.GetBitsFromBuffer(6)];
                        scalefactor2 = ScaleFactors[stream.GetBitsFromBuffer(6)];
                        scalefactor3 = ScaleFactors[stream.GetBitsFromBuffer(6)];
                        break;

                    case 1:
                        scalefactor1 = scalefactor2 = ScaleFactors[stream.GetBitsFromBuffer(6)];
                        scalefactor3 = ScaleFactors[stream.GetBitsFromBuffer(6)];
                        break;

                    case 2:
                        scalefactor1 = scalefactor2 = scalefactor3 = ScaleFactors[stream.GetBitsFromBuffer(6)];
                        break;

                    case 3:
                        scalefactor1 = ScaleFactors[stream.GetBitsFromBuffer(6)];
                        scalefactor2 = scalefactor3 = ScaleFactors[stream.GetBitsFromBuffer(6)];
                        break;
                }
                prepare_sample_reading(header, allocation, 0, factor, codelength, c, d);
            }
        }

        /// <summary>
        ///     *
        /// </summary>
        public override bool ReadSampleData(IBitstream stream)
        {
            if (allocation != 0)
                if (groupingtable[0] != null)
                {
                    int samplecode = stream.GetBitsFromBuffer(codelength[0]);
                    // create requantized samples:
                    samplecode += samplecode << 1;
                    float[] target = samples;
                    float[] source = groupingtable[0];
                    /*
                    int tmp = 0;
                    int temp = 0;
                    target[tmp++] = source[samplecode + temp];
                    temp++;
                    target[tmp++] = source[samplecode + temp];
                    temp++;
                    target[tmp] = source[samplecode + temp];
                    */
                    //Bugfix:
                    int tmp = 0;
                    int temp = samplecode;

                    if (temp > source.Length - 3)
                        temp = source.Length - 3;

                    target[tmp] = source[temp];
                    temp++;
                    tmp++;
                    target[tmp] = source[temp];
                    temp++;
                    tmp++;
                    target[tmp] = source[temp];

                    // memcpy (samples, groupingtable + samplecode, 3 * sizeof (real));
                }
                else
                {
                    samples[0] = (float)((stream.GetBitsFromBuffer(codelength[0])) * factor[0] - 1.0);
                    samples[1] = (float)((stream.GetBitsFromBuffer(codelength[0])) * factor[0] - 1.0);
                    samples[2] = (float)((stream.GetBitsFromBuffer(codelength[0])) * factor[0] - 1.0);
                }

            samplenumber = 0;
            if (++groupnumber == 12)
                return true;
            return false;
        }

        /// <summary>
        ///     *
        /// </summary>
        public override bool PutNextSample(int channels, SynthesisFilter filter1, SynthesisFilter filter2)
        {
            if ((allocation != 0) && (channels != OutputChannels.RIGHT_CHANNEL))
            {
                float sample = samples[samplenumber];

                if (groupingtable[0] == null)
                    sample = (sample + d[0]) * c[0];
                if (groupnumber <= 4)
                    sample *= scalefactor1;
                else if (groupnumber <= 8)
                    sample *= scalefactor2;
                else
                    sample *= scalefactor3;
                filter1.WriteSample(sample, subbandnumber);
            }

            if (++samplenumber == 3)
                return true;
            return false;
        }
    }
}
